Search Results - "Christopher Ruf"

Wind Speed Retrieval Algorithm for the Cyclone Global Navigation Satellite System (CYGNSS) Mission by Clarizia, Maria Paola, Ruf, Christopher S.

“…A retrieval algorithm is presented for the Level 2 ocean surface wind speed data product of the Cyclone Global Navigation Satellite System (CYGNSS) mission…”
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Development of the CYGNSS Geophysical Model Function for Wind Speed by Ruf, Christopher S., Balasubramaniam, Rajeswari

“…Geophysical model functions (GMFs) are developed which map the Level 1 observables made by the Cyclone Global Navigation Satellite System (CYGNSS) radar…”
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Retrieving Freeze/Thaw Surface State From CYGNSS Measurements by Carreno-Luengo, Hugo, Ruf, Christopher S.

“…Freeze/Thaw (F/T) surface state retrieval is important to further understand hydrological patterns and climate change. This article investigates the use of…”
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Characterization of rain impact on L-Band GNSS-R ocean surface measurements by Balasubramaniam, Rajeswari, Ruf, Christopher

“…Earth remote sensing using reflected GNSS signals is currently an emerging trend especially in ocean surface wind measurements. Unlike the existing…”
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Statistical Derivation of Wind Speeds From CYGNSS Data by Clarizia, Maria Paola, Ruf, Christopher S.

“…In this article, a statistical methodology to estimate wind speed from CYGNSS observables is proposed and implemented. The approach uses the cumulative…”
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Spaceborne GNSS-R Minimum Variance Wind Speed Estimator by Clarizia, Maria Paola, Ruf, Christopher S., Jales, Philip, Gommenginger, Christine

“…A Minimum Variance (MV) wind speed estimator for Global Navigation Satellite System-Reflectometry (GNSS-R) is presented. The MV estimator is a composite of…”
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Toward the Detection and Imaging of Ocean Microplastics With a Spaceborne Radar by Evans, Madeline C., Ruf, Christopher S.

“…Ocean microplastic concentrations are known to vary significantly by location, with especially high levels in the North Atlantic and North Pacific gyres. Most…”
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First Precise Spaceborne Sea Surface Altimetry With GNSS Reflected Signals by Cardellach, Estel, Li, Weiqiang, Rius, Antonio, Semmling, Maximilian, Wickert, Jens, Zus, Florian, Ruf, Christopher S., Buontempo, Carlo

“…The precision of sea surface altimetry using bistatically reflected signals of the Global Navigation Satellite System (GNSS) is typically one to two orders of…”
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A CYGNSS‐Based Algorithm for the Detection of Inland Waterbodies by Gerlein‐Safdi, Cynthia, Ruf, Christopher S.

“…The Cyclone Global Navigation Satellite System (CYGNSS) is a new constellation of eight low Earth orbiting spacecrafts that receive both direct and reflected…”
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A New Paradigm in Earth Environmental Monitoring with the CYGNSS Small Satellite Constellation by Ruf, Christopher S., Chew, Clara, Lang, Timothy, Morris, Mary G., Nave, Kyle, Ridley, Aaron, Balasubramaniam, Rajeswari

“…A constellation of small, low-cost satellites is able to make scientifically valuable measurements of the Earth which can be used for weather forecasting,…”
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Calibration and Unwrapping of the Normalized Scattering Cross Section for the Cyclone Global Navigation Satellite System by Gleason, Scott, Ruf, Christopher S., Clarizia, Maria Paola, O'Brien, Andrew J.

“…This paper develops and characterizes the algorithms used to generate the Level 1 (L1) science data products of the Cyclone Global Navigation Satellite System…”
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Assessment of CYGNSS Wind Speed Retrieval Uncertainty by Ruf, Christopher S., Gleason, Scott, McKague, Darren S.

“…Measurements of near surface wind speed made by the Cyclone Global Navigation Satellite System (CYGNSS) constellation of GNSS-R satellites are evaluated and…”
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First spaceborne observation of sea surface height using GPS‐Reflectometry by Clarizia, Maria Paola, Ruf, Christopher, Cipollini, Paolo, Zuffada, Cinzia

“…An analysis of spaceborne Global Positioning System reflectometry (GPS‐R) data from the TechDemoSat‐1 (TDS‐1) satellite is carried out to image the ocean sea…”
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Mapping Freezing and Thawing Surface State Periods With the CYGNSS Based F/T Seasonal Threshold Algorithm by Carreno-Luengo, Hugo, Ruf, Christopher S.

“…Freeze/Thaw (F/T) surface state detection and imaging has been demonstrated as a capability of NASA's Cyclone Global Navigation Satellite System mission. The…”
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A Preliminary Impact Study of CYGNSS Ocean Surface Wind Speeds on Numerical Simulations of Hurricanes by Cui, Zhiqiang, Pu, Zhaoxia, Tallapragada, Vijay, Atlas, Robert, Ruf, Christopher S.

“…The NASA Cyclone Global Navigation Satellite System (CYGNSS) was launched in December 2016, providing an unprecedented opportunity to obtain ocean surface wind…”
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Development and Application of a GNSS-R Error Model for Hurricane Winds by Balasubramaniam, Rajeswari, Ruf, Christopher S.

“…A parametric error model is developed to represent the uncertainty in retrieval of hurricane force wind speed by a space borne GNSS-R instrument. The…”
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A New Multiresolution CYGNSS Data Product for Fully and Partially Coherent Scattering by Carreno-Luengo, Hugo, Ruf, Christopher S., Gleason, Scott, Russel, Anthony

“…A new Cyclone Global Navigation Satellite System (CYGNSS) data product is described, which is generated from the raw intermediate frequency (IF) data. The…”
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Improved CYGNSS Wind Speed Retrieval Using Significant Wave Height Correction by Pascual, Daniel, Clarizia, Maria Paola, Ruf, Christopher S.

“…This article presents the methodology for an improved estimation of the sea surface wind speed measured by the cyclone global navigation satellite system…”
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Neural Network Based Quality Control of CYGNSS Wind Retrieval by Balasubramaniam, Rajeswari, Ruf, Christopher

“…Global Navigation Satellite System – Reflectometry (GNSS-R) is a relatively new field in remote sensing that uses reflected GPS signals from the Earth’s…”
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Effects of microplastics and surfactants on surface roughness of water waves by Sun, Yukun, Bakker, Thomas, Ruf, Christopher, Pan, Yulin

“…We study the flow physics underlying the recently developed remote sensing capability of detecting oceanic microplastics, which is based on the measurable…”
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